A set of pics of 7120 serial number 1041 has been posted on this page. The amp was for some years in Northern Germany, now in the UK and for sale.
The page on surviving UL730s has been tidied up and two new amps registered, one currently for sale in France, the other in Denmark. The large set of images of serial number 1052 has been moved to a page of its own.
Sets of pics of four more 710s to be posted in the course of this week.
Triumph Electronics, which assembled the 4 and 7 series for Vox, was a small place and produced work of the highest quality – but not always in an orderly linear fashion. Elements changed as production proceeded. Wiring was copied from sets of component boards not designs on layout sheets.
The schematics as we have them were for the repairmen and service departments, not the wirers and assemblers at Triumph. And there is no question of anyone fooling anyone, or anyone being fooled if the circuit of an amp did not correspond exactly to what was delineated on the schematic.
Most of the schematics as we have them are in any case relatively late, being fair copies of earlier sheets (of an unknown nature).